REGISTER | LOGIN
Breaking News
Comments
Newest First | Oldest First | Threaded View
<<   <   Page 3 / 3
Bert22306
User Rank
Author
re: 787 Dreamliner investigation probes battery-charging electronics
Bert22306   1/22/2013 8:39:59 PM
NO RATINGS
I don't understand the comment about exceeding the design voltage. You wouldn't expect an overcharge to result in higher battery voltage, unless they're talking about the charging voltage being higher than spec. Overcharging LiOn cells is manifested by continuing to run too much current through them after the charging current has dropped to a low level, like 3 percent of the cell's rated current capacity. But the voltage, at that point in the charging cycle, has been at a constant level for most of the charging period. It quickly ramps up in the initial charging period, then settles as the reverse current through the battery drops steadily. Perhaps they meant exceeding the charging voltage, during the charging cycle? Overcharging a battery is not the same as overfilling a gasoline tank, if you are equating voltage with gallons of gasoline.

<<   <   Page 3 / 3


Like Us on Facebook
EE Life
Frankenstein's Fix, Teardowns, Sideshows, Design Contests, Reader Content & More
Martin Rowe

Test Tool Finds Ethernet Wiring Errors
Martin Rowe
Post a comment
When my house was renovated several years ago, I had the electrician install network outlets in numerous places, then run the LAN cables to a wiring closet. But he didn't document the ends ...

Martin Rowe

Local Electronics Store Supplies Engineers and Hobbyists
Martin Rowe
5 comments
Rochester, N.Y. — Tucked away in this western New York city known for its optics is Goldcrest Electronics, a local store that's supplied businesses and individuals with electronic ...

Martin Rowe

How to Transform a Technology University (Book Review)
Martin Rowe
1 Comment
The Presiding Genius of the Place by Alison Chisolm. WPI, Worcester, Mass., 234 pp., 2016. Engineers love to discuss, and often criticize, engineering education. They often claim ...

Max Maxfield

Aloha from EEWeb
Max Maxfield
Post a comment
Just a few minutes ago as I pen these words, I posted this blog about this month's Cartoon Punchline Competition over on EEWeb.com.